#include "brw_state.h"
#include "brw_defines.h"
#include "intel_batchbuffer.h"
+#include "main/fbobject.h"
+#include "main/framebuffer.h"
+#include "main/viewport.h"
-/* The clip VP defines the guardband region where expensive clipping is skipped
- * and fragments are allowed to be generated and clipped out cheaply by the SF.
- *
- * By setting it to NDC bounds of [-1,1], we don't do GB clipping. It's
- * supposed to cause seams to become visible in apps due to shared edges taking
- * different clip/no clip paths depending on whether the rest of the prim ends
- * up in the guardband or not.
- */
static void
-prepare_clip_vp(struct brw_context *brw)
+gen6_upload_sf_and_clip_viewports(struct brw_context *brw)
{
- struct brw_clipper_viewport vp;
-
- vp.xmin = -1.0;
- vp.xmax = 1.0;
- vp.ymin = -1.0;
- vp.ymax = 1.0;
-
- drm_intel_bo_unreference(brw->clip.vp_bo);
- brw->clip.vp_bo = brw_cache_data(&brw->cache, BRW_CLIP_VP,
- &vp, sizeof(vp));
-}
+ struct gl_context *ctx = &brw->ctx;
+ struct gen6_sf_viewport *sfv;
+ struct brw_clipper_viewport *clv;
+ GLfloat y_scale, y_bias;
+ const bool render_to_fbo = _mesa_is_user_fbo(ctx->DrawBuffer);
-const struct brw_tracked_state gen6_clip_vp = {
- .dirty = {
- .mesa = _NEW_VIEWPORT, /* XXX: not really, but we need nonzero */
- .brw = 0,
- .cache = 0,
- },
- .prepare = prepare_clip_vp,
-};
+ /* BRW_NEW_VIEWPORT_COUNT */
+ const unsigned viewport_count = brw->clip.viewport_count;
-static void
-prepare_sf_vp(struct brw_context *brw)
-{
- GLcontext *ctx = &brw->intel.ctx;
- const GLfloat depth_scale = 1.0F / ctx->DrawBuffer->_DepthMaxF;
- struct brw_sf_viewport sfv;
- GLfloat y_scale, y_bias;
- const GLboolean render_to_fbo = (ctx->DrawBuffer->Name != 0);
- const GLfloat *v = ctx->Viewport._WindowMap.m;
+ sfv = brw_state_batch(brw, AUB_TRACE_SF_VP_STATE,
+ sizeof(*sfv) * viewport_count,
+ 32, &brw->sf.vp_offset);
+ memset(sfv, 0, sizeof(*sfv) * viewport_count);
- memset(&sfv, 0, sizeof(sfv));
+ clv = brw_state_batch(brw, AUB_TRACE_CLIP_VP_STATE,
+ sizeof(*clv) * viewport_count,
+ 32, &brw->clip.vp_offset);
/* _NEW_BUFFERS */
if (render_to_fbo) {
y_scale = 1.0;
- y_bias = 0;
+ y_bias = 0.0;
} else {
y_scale = -1.0;
- y_bias = ctx->DrawBuffer->Height;
+ y_bias = (float)_mesa_geometric_height(ctx->DrawBuffer);
}
- /* _NEW_VIEWPORT */
- sfv.viewport.m00 = v[MAT_SX];
- sfv.viewport.m11 = v[MAT_SY] * y_scale;
- sfv.viewport.m22 = v[MAT_SZ] * depth_scale;
- sfv.viewport.m30 = v[MAT_TX];
- sfv.viewport.m31 = v[MAT_TY] * y_scale + y_bias;
- sfv.viewport.m32 = v[MAT_TZ] * depth_scale;
+ for (unsigned i = 0; i < viewport_count; i++) {
+ float scale[3], translate[3];
+
+ /* _NEW_VIEWPORT */
+ _mesa_get_viewport_xform(ctx, i, scale, translate);
+ sfv[i].m00 = scale[0];
+ sfv[i].m11 = scale[1] * y_scale;
+ sfv[i].m22 = scale[2];
+ sfv[i].m30 = translate[0];
+ sfv[i].m31 = translate[1] * y_scale + y_bias;
+ sfv[i].m32 = translate[2];
+
+ /* According to the "Vertex X,Y Clamping and Quantization" section of the
+ * Strips and Fans documentation, objects must not have a screen-space
+ * extents of over 8192 pixels, or they may be mis-rasterized. The maximum
+ * screen space coordinates of a small object may larger, but we have no
+ * way to enforce the object size other than through clipping.
+ *
+ * If you're surprised that we set clip to -gbx to +gbx and it seems like
+ * we'll end up with 16384 wide, note that for a 8192-wide render target,
+ * we'll end up with a normal (-1, 1) clip volume that just covers the
+ * drawable.
+ */
+ const float maximum_post_clamp_delta = 8192;
+ float gbx = maximum_post_clamp_delta / ctx->ViewportArray[i].Width;
+ float gby = maximum_post_clamp_delta / ctx->ViewportArray[i].Height;
+
+ clv[i].xmin = -gbx;
+ clv[i].xmax = gbx;
+ clv[i].ymin = -gby;
+ clv[i].ymax = gby;
+ }
- drm_intel_bo_unreference(brw->sf.vp_bo);
- brw->sf.vp_bo = brw_cache_data(&brw->cache, BRW_SF_VP,
- &sfv, sizeof(sfv));
+ brw->ctx.NewDriverState |= BRW_NEW_SF_VP | BRW_NEW_CLIP_VP;
}
-const struct brw_tracked_state gen6_sf_vp = {
+const struct brw_tracked_state gen6_sf_and_clip_viewports = {
.dirty = {
- .mesa = _NEW_VIEWPORT | _NEW_BUFFERS,
- .brw = 0,
- .cache = 0,
+ .mesa = _NEW_BUFFERS |
+ _NEW_VIEWPORT,
+ .brw = BRW_NEW_BATCH |
+ BRW_NEW_BLORP |
+ BRW_NEW_VIEWPORT_COUNT,
},
- .prepare = prepare_sf_vp,
+ .emit = gen6_upload_sf_and_clip_viewports,
};
-static void prepare_viewport_state_pointers(struct brw_context *brw)
-{
- brw_add_validated_bo(brw, brw->clip.vp_bo);
- brw_add_validated_bo(brw, brw->sf.vp_bo);
- brw_add_validated_bo(brw, brw->cc.vp_bo);
-}
-
static void upload_viewport_state_pointers(struct brw_context *brw)
{
- struct intel_context *intel = &brw->intel;
-
BEGIN_BATCH(4);
- OUT_BATCH(CMD_VIEWPORT_STATE_POINTERS << 16 | (4 - 2) |
+ OUT_BATCH(_3DSTATE_VIEWPORT_STATE_POINTERS << 16 | (4 - 2) |
GEN6_CC_VIEWPORT_MODIFY |
GEN6_SF_VIEWPORT_MODIFY |
GEN6_CLIP_VIEWPORT_MODIFY);
- OUT_RELOC(brw->clip.vp_bo, I915_GEM_DOMAIN_INSTRUCTION, 0, 0);
- OUT_RELOC(brw->sf.vp_bo, I915_GEM_DOMAIN_INSTRUCTION, 0, 0);
- OUT_RELOC(brw->cc.vp_bo, I915_GEM_DOMAIN_INSTRUCTION, 0, 0);
+ OUT_BATCH(brw->clip.vp_offset);
+ OUT_BATCH(brw->sf.vp_offset);
+ OUT_BATCH(brw->cc.vp_offset);
ADVANCE_BATCH();
-
- intel_batchbuffer_emit_mi_flush(intel->batch);
}
const struct brw_tracked_state gen6_viewport_state = {
.dirty = {
.mesa = 0,
- .brw = BRW_NEW_BATCH,
- .cache = (CACHE_NEW_CLIP_VP |
- CACHE_NEW_SF_VP |
- CACHE_NEW_CC_VP)
+ .brw = BRW_NEW_BATCH |
+ BRW_NEW_BLORP |
+ BRW_NEW_CC_VP |
+ BRW_NEW_CLIP_VP |
+ BRW_NEW_SF_VP |
+ BRW_NEW_STATE_BASE_ADDRESS,
},
- .prepare = prepare_viewport_state_pointers,
.emit = upload_viewport_state_pointers,
};
projects / mesa.git / blobdiff